Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
trung va » truong va, trang va, trung ha
hang tai » hang va, dung tai
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
truc va » thuc va, thuc vat
cua tre » cuu tre, cua triet, dua tren
y nang » ky nang, ly nang, v nang
cua te » cua tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach y nang xa hoi. hieu van nam ((truc va) or (trung va)) hang tai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van nam ((truc va) OR (trung va)) hang tai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu van nam ((truc va) or (trung va)) hang tai ((cua tre) OR (cua te))*".